Where are all the nurses?

We have a small nursing team - great people, just not enough of them. Of the four contracted posts one gave up work and another was injured, now another is going on holiday. They are entitled to change jobs, have holidays and have accidents and I don;t begrudge them at all. But can we get replacements? We can't even get applications for the jobs. It isn't standard nursing but it is rewarding but it's almost impossible to get visible to nurses looking for work when the local hospitals etc. won't allow you to use their noticeboards or networks to advertise - they're afraid we'll poach their staff! It's the NHS that's paying anyway. Anybody out there looking for work?